저항운동의 속도 차이가 중년여성의 근력 불균형에 미치는 영향

Abstract

This study tested the hypothesis that strength imbalance would improve at after slow-speed resistance training but would not alter at after normal-speed resistance training. Twelve middle aged women were randomly divided into slow-speed resistance training group (SSG, n=6) and normal-speed resistance training group (NSG, n=6). SSG was performed for 15 repetition × 3 sets and total 7-s per repetition (concentric: 3-s, isometric: 1-s, eccentric: 3-s), and NSG was also performed the for 35 repetition × 3 sets and total 3-s per repetition (concentric: 1-s, isometric: 1-s, eccentric: 1-s). Both groups performed the low intensity resistance training at 30% of 1-RM for 105-s per set, rest for 1 min between sets, rest for 3 min between exercises, and 2~3 times per week, for 4 weeks. All subjects were measured for body composition (weight, BMI, and %fat), muscle activity and muscle fatigue of biceps brachii, vastus medialis and vastus lateralis in dominant (DL) and non-dominant (NDL). At SSG, LSI (%) = (1-NDL/DL) × 100 of muscle activity was significantly decreased in biceps brachii, vastus medialis, and vastus lateralis after 4-week resistance training compared with before (P.05). However, LSI of muscle activity did not show statistically significant differences in NSG after 4-week resistance training compared with before. LSI of muscle fatigue did not show statistically significant differences in both groups after 4-week resistance training compared with before. Our results suggest that strength imbalance improve at after slow-speed resistance training.